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초록
This study focused on achieving high ionic conductivity in Li-La-TiO (LLTO) solid electrolyte. To enhance ionic conductivity, the synthesis reaction was optimized by controlling the composite crystal structure of TiO2 at the B-site of the perovskite (ABO(3)) structured LLTO, incorporating rutile, brookite, and anatase phases. The solid-phase LLTO, synthesized utilizing the core - shell structured composite-phase TiO2 developed in this study for the first time, successfully transformed its crystal structure to beta-LLTO (tetragonal to cubic). This resulted in a significant improvement in ionic conductivity (i.e. 1.11 x 10(-4) Scm(-1)). The study findings confirmed that the composite crystal structure TiO2 used in the solid-phase synthesis of LLTO induced an increase in oxygen vacancies during the synthesis process, thereby reducing the step-free energy required for the final synthesis.
키워드
- 제목
- TiO<sub>2</sub> phase-controlled synthesis of Li-La-TiO solid electrolytes for advanced all-solid-state batteries
- 저자
- Kim, Minjeong; Nam, Wolil; Seo, Jihye; Park, Jihyun; Heo, Seokha; Hwang, Yuna; Chee, Sang-Soo; Lee, Soobeom; Cho, Seungchan; An, Geon-hyoung; Kim, Yangdo; Choi, Moonhee
- 발행일
- 2024-09
- 유형
- Article; Early Access
- 저널명
- Journal of Asian Ceramic Societies
- 권
- 12
- 호
- 4
- 페이지
- 296 ~ 305